I would like to see that competitors from season1 get to keep their original number unless they are looking to change, then they fit the first come first serve.
I dont have a problem with the downforce rule. It is one way to make it more of a spec series (like IROC), without it being a spec series. The cars are much more stable and better on tires with full downforce (I ran about 12 more laps at Indy with full down force compared to 10-15 less than full). Racing at Daytona may be better this way too. If the cars are a bit more stable on that track, then the racing should be closer with less incidents of cars being all over the place. It may also slow them down just a touch, making the slipstream a little less exaggerated (similar positive effect as I found the no supercharger to be).
Being a little on the OCD side of things, I would be in favor of having the cars look a little more the same. For example, we all pick the same number font, either 1 or 2. I also wouldn't mind seeing the wheels all be the same, either everyone runs black wheels, chrome wheels, white wheels, or body color wheels (my favorite on this car). I would like to not see the color change, chrome, or matte (even though the matte black looked good) paints be used on the body either. Just my 2 cents, I will step off my soap box now.